Tim Donohue created DS-1481:
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Summary: "dc.date.issued" is often incorrectly set (reported from
Google)
Key: DS-1481
URL: https://jira.duraspace.org/browse/DS-1481
Project: DSpace
Issue Type: Improvement
Components: DSpace API
Affects Versions: 3.1, 3.0, 1.8.2, 1.8.1, 1.8.0, 1.7.2, 1.7.1, 1.7.0
Reporter: Tim Donohue
Fix For: 4.0
Google (Anurag Acharya and Darcy Darpa) has contacted DuraSpace about a common
indexing issue affecting all DSpace sites.
When Google & Google Scholar index DSpace content (from a variety of
institutions), the "dc.date.issued" value is incorrect the majority of the
time. The reason is that, if unspecified, DSpace sets this issued date to the
*date of accession* (i.e. date that it was submitted to DSpace), see:
https://github.com/DSpace/DSpace/blob/master/dspace-api/src/main/java/org/dspace/content/InstallItem.java#L130
Google says this causes their crawlers (for both Google & Google Scholar) to
assume that the date of accession is actually the formal publication date.
Rather than defaulting the 'dc.date.issued' to the accession date, Google
recommends we leave it blank. DSpace is already tracking the accession date
separately (in 'dc.date.accessioned'), so it seems odd to set 'dc.date.issued'
to the same value by default.
Google will be sending along some examples of this. They said they have seen
repositories, where 30-50% of their items all have the same "dc.date.issued",
as those items were all imported on the same date.
This seems like a very reasonable recommendation to me as well. I'm not sure
we should be setting 'dc.date.issued' by default, as it really is meant to be
the date of *formal publication*, and not the date that something is made
available on the web.
This also seems like a small fix (remove a few lines from InstallItem).
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